Calcium, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Calcium, a community in Jefferson County, New York.
This Afternoon
64°F
Mostly Cloudy
Mostly cloudy, with a high near 64. South wind around 9 mph.
7-day forecast for Calcium
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Mostly Cloudy | 9 mph S | 8% |
| Tonight | 56°F | Mostly Cloudy | 8 mph S | 6% |
| Wednesday | 74°F | Mostly Sunny | 8 mph S | 6% |
| Wednesday Night | 58°F | Mostly Cloudy then Light Rain | 7 to 13 mph S | 84% |
| Thursday | 67°F | Light Rain | 7 to 14 mph SW | 88% |
| Thursday Night | 48°F | Chance Light Rain then Mostly Cloudy | 6 mph SW | 32% |
| Friday | 62°F | Mostly Cloudy then Slight Chance Light Rain | 5 mph W | 18% |
| Friday Night | 41°F | Chance Light Rain | 3 mph N | 33% |
| Saturday | 54°F | Chance Light Rain | 5 to 8 mph NW | 45% |
| Saturday Night | 36°F | Chance Light Rain | 6 mph W | 45% |
| Sunday | 51°F | Slight Chance Light Rain | 3 to 10 mph SW | 23% |
| Sunday Night | 34°F | Chance Light Rain | 6 mph W | 37% |
| Monday | 51°F | Chance Light Rain | 5 to 12 mph W | 37% |
| Monday Night | 34°F | Chance Light Rain | 7 mph SW | 29% |
Forecast source: National Weather Service (api.weather.gov) for Calcium (44.041, -75.849). Updated through the day.
Growing snapshot for Calcium
Last spring frost
May 2
First fall frost
Oct 13
Growing season
163 days
Hardiness zone
5a
More local growing data for Calcium: nearby ZIP 13616 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Watertown, Ny (3.8 mi from Calcium). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.